International Gem Testing Association (IGTA) is the third party gemstone inspection and supervision institution established in accordance with the law. 

　　

　　Association detection is the main business scope mainly include the identification of jewellery, diamond grading, synthetic Moissanite (Mo Sangshi) quality rating and ornamental identification, determination of harmful elements and the thickness of nickel ore, precious metal purity detection and identification of jewelry precious metal coating release and jewelry